dayClick

Triggered when the user clicks on a day.

function( date, jsEvent, view, [ resourceObj ] ) { }

date holds a Moment for the clicked day.
If an all-day area has been clicked,
the moment will be ambiguously-timed.
If a slot in the agendaWeek or agendaDay views has been clicked,
date will have the slot's time.

jsEvent holds the native JavaScript event with low-level information such as click coordinates.